Supermicro SSE-G2252 User Manual page 229

• Priority – Defines the priority used for this port in the Spanning Tree Protocol. If the
path cost for all ports on a switch are the same, the port with the highest priority (i.e.,
lowest value) will be configured as an active link in the Spanning Tree. This makes a
port with higher priority less likely to be blocked if the Spanning Tree Protocol is
detecting network loops. Where more than one port is assigned the highest priority,
the port with lowest numeric identifier will be enabled. (Default: 128; Range: 0-240,
in steps of 16)
• Admin MST Path Cost – This parameter is used by the MSTP to determine the
best path between devices. Therefore, lower values should be assigned to ports
attached to faster media, and higher values assigned to ports with slower media.
(Path cost takes precedence over port priority.) Note that when the Path Cost
Method is set to short (page 3-63), the maximum path cost is 65,535.
By default, the system automatically detects the speed and duplex mode used on
each port, and configures the path cost according to the values shown below. Path
cost "0" is used to indicate auto-configuration mode. When the short path cost
method is selected and the default path cost recommended by the IEEE 8021w
standard exceeds 65,535, the default is set to 65,535
The recommended range is listed in
Range" on page
Path Costs" on page
Web Interface
To configure MSTP parameters for a port or trunk:
1. Click S
PANNING
2. Select C
ONFIGURE
3. Select C
ONFIGURE
4. Enter the priority and path cost for an interface
5. Click A .
PPLY
Figure 9-16. Configuring MSTP Interface Settings
9-14. The default path costs are listed in
9-14.
T > MSTP.
REE
I from the Step list.
NTERFACE
from the Action list.
Chapter 9: Spanning Tree Algorithm
Table 9-1: "Recommended STA Path Cost
9-23
Table 9-2: "Default STA